Castleton Commodities International · 9 hours ago
Full-Stack Software Engineer Internship (Summer 2026)
Stamford, CT
Internship
Onsite
Intern
Start in 2026 SummerCastleton Commodities International is a leading global energy commodities merchant and infrastructure asset investor. They are looking for a motivated and detail-oriented Front Office Software Engineering Intern to join their Global Data Science & Technology team, contributing to the development of software tools that support trading and analytics workflows.
Oil and Gas
Responsibilities
Contribute to the development of front office software tools that support real-time trading, market data analytics, and visualization
Work with the commercial trading team to optimize and re-engineer pricing models, decision tools, and trading workflows
Build and enhance Python-based microservices and APIs for internal data access and operations automation
Assist in building data visualization dashboards using libraries such as Streamlit, integrating commercial KPIs, price curves, and supply/demand analytics
Participate in cloud-native application development using AWS services, including Kubernetes and Kafka
Support automation of deployment processes using modern DevOps tools (e.g., Git, Docker, Helm, CI/CD pipelines)
Collaborate with the Data Science team to help integrate ML-driven analytics into front office workflows
Qualification
Required
Currently pursuing a Bachelor's or Master's degree in Computer Science, Engineering, Management Information Systems, or related technical field of study
Expected graduation date of Winter 2026 or Spring/Summer 2027
Strong programming experience in Python (preferred libraries: Pandas, NumPy, etc.)
Front-End programming experience using React or Angular, with strong JavaScript/TypeScript fundamentals
Familiarity with version control tools (e.g., Git) and software development best practices
Strong problem-solving abilities and an eagerness to learn about financial markets and trading systems
Excellent communication skills and ability to work in a fast-paced, collaborative environment
Company
Castleton Commodities International
Castleton Commodities International is an independent global commodities merchant.
Founded in 2001
201-500 employees
H1B Sponsorship
Castleton Commodities International has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (14)
2024 (9)
2023 (6)
2022 (11)
2021 (17)
2020 (11)
Funding
Current Stage
Growth StageTotal Funding
$4.18B2025-11-18Debt Financing· $2.11B
2023-11-15Debt Financing· $2.08B
Leadership Team
Lauren Haymond
Managing Director, Global Head of Talent Strateg
Recent News
2025-04-03
Company data provided by crunchbase